/Engine/Plugins/Runtime/RigVM/Source/RigVM/Public/RigVMCore/RigVMMemoryStorage.h
Computes the data if necessary and returns true if the value is valid
True if the value of the handle is valid after the compute
bool ComputeLazyValueIfNecessary ( [FRigVMExtendedExecuteContext](API\Plugins\RigVM\RigVMCore\FRigVMExtendedExecuteContext) & Context, int32 InSliceIndex )